4images 1.7.11 SQL Injection
Posted on 10 December 2015
Security Advisory - Curesec Research Team 1. Introduction Affected Product: 4images 1.7.11 Fixed in: 1.7.12 Fixed Version Link: http://www.4homepages.de/download-4images Vendor Website: http://www.4homepages.de/ Vulnerability Type: SQL Injection Remote Exploitable: Yes Reported to vendor: 09/29/2015 Disclosed to public: 12/02/2015 Release mode: Coordinated release CVE: Requested, but not assigned Credits Tim Coen of Curesec GmbH 2. Vulnerability Description CVSS Medium 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P Description When backing up the database, the user can supply the tables that should be backed up. The program does not check if these tables actually belong to the 4images database or to a different database. Because of this, it is possible to back up, and thus read, any database the database user has access to. However, even if there were a check for the database, it would still be possible to perform arbitrary SELECT statements by injecting into a SELECT query that looks like this: "SELECT * FROM $table" where $table is user supplied. Admin credentials are required to back up the database. 3. Proof of Concept POST /4images/admin/backup.php HTTP/1.1 __csrf=43c557c252fe6f57db4720b23771c7ab&action=makebackup&db_tables%5B%5D=mysql.user POST /4images/admin/backup.php HTTP/1.1 __csrf=43c557c252fe6f57db4720b23771c7ab&action=makebackup&db_tables%5B%5D=4images_comments where comment_id=-1 union all select user,password,3,4,5,6,7,8 from mysql.user 4. Solution To mitigate this issue please upgrade at least to version 1.7.12: http://www.4homepages.de/download-4images Please note that a newer version might already be available. 5. Report Timeline 09/29/2015 Informed Vendor about Issue 10/21/2015 Reminded Vendor of Disclosure Date 11/03/2015 Vendor releases fix 11/17/2015 CVE Requested (no reply) 12/02/2015 Disclosed to public Blog Reference: https://blog.curesec.com/article/blog/4images-1711-SQL-Injection-108.html -- blog: https://blog.curesec.com tweet: https://twitter.com/curesec Curesec GmbH Curesec Research Team Romain-Rolland-Str 14-24 13089 Berlin, Germany
